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以山梨、杜梨、南果梨、早酥梨、苹果梨，以及黄海棠、怀来海棠、新疆野苹果为试材，以枝干为样本，在自然条件下用ＱＪＺ型便携式惠斯通电桥测定活体电阻值。结果表明：电阻值与测距呈直线正相关；电阻值与温度呈极显著负相关；无论是多年生枝还是一年生枝，电阻值休眠期较生长期大而稳定；多年生枝较一年生枝电阻值小而稳定；多年生枝粗度与电阻值呈负相关；电阻值与树体生长势有负相关趋势；电阻值与树种品种的抗寒性呈正相关。初步认为，活体电阻法可做为苹果树和梨树树体抗寒性的鉴定方法。
The pear, pear, pear, pear, apple pear, yellow begonia, crabgrass, Xinjiang apples were taken as experimental materials and the branches were taken as samples to test QJZ portable Wheatstone bridge under natural conditions Living body resistance. The results showed that there was a linear positive correlation between resistance and distance, and the resistance was extremely significantly negatively correlated with temperature. Whether in perennial or annual, the dormancy of resistance was longer and stable than that of growth; the resistance of perennial branches was smaller than that of one year While the stability of perennial branches was negatively correlated with the resistance value. There was a negative correlation between resistance value and tree growth potential. The resistance value was positively correlated with the cold resistance of tree species. Initially, living resistance method can be used as apples and pear tree cold tolerance identification method.